43194491 has 2 divisors, whose sum is σ = 43194492. Its totient is φ = 43194490.

The previous prime is 43194469. The next prime is 43194493. The reversal of 43194491 is 19449134.

43194491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43194491 is a prime.

It is a Sophie Germain prime.

Together with 43194493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43194493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21597245 + 21597246.

It is an arithmetic number, because the mean of its divisors is an integer number (21597246).

Almost surely, 2^43194491 is an apocalyptic number.

43194491 is a deficient number, since it is larger than the sum of its proper divisors (1).

43194491 is an equidigital number, since it uses as much as digits as its factorization.

43194491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 43194491 is about 6572.2515928714. The cubic root of 43194491 is about 350.8672127536.

The spelling of 43194491 in words is "forty-three million, one hundred ninety-four thousand, four hundred ninety-one".